/Engine/Source/Runtime/Core/Public/Misc/CommandLine.h
Builds a command line string from the ArgC/ArgV main() arguments, together with an optional prefix or suffix, for adding additional command list arguments programmatically.
static [FString](API\Runtime\Core\Containers\FString) BuildFromArgV ( const ANSICHAR * Prefix, int32 ArgC, ANSICHAR * ArgV, const ANSICHAR * Suffix )